Title:
LASER WELDING METHOD AND DEVICE THEREFOR
Document Type and Number:
Japanese Patent JP3212551
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make it possible to stabilize a weld bead by welding base metals while rotating an electrode arranged on the rear side of the base metals and removing the spatters on the electrode surface in a position where the base metals are not subjected to the irradiation with a laser beam.
SOLUTION: Steel plates 1, 2 are welded by the laser beam 3. The electrode 4 is arranged below the weld zone and a plasma working gas 5 is supplied between the steel plates 1, 2 and the electrode 4. Voltage is impressed on the electrode by a power source 6 to generate a plasma 7. The electrode 4 is rotated. The irradiation position of the laser beam 3 is set at a point exclusive of the center of rotation of the electrode 4. A spatter removing device 8 is brought into contact with the position of the electrode 4 to which the laser beam 3 is not cast at all times, by which the spatters on the electrode 4 surface are removed. The material of the electrode 4 is composed of steel (alloy) and the electrode 4 is cooled. In addition, the surface speed of the electrode 4 is preferably made equal to the welding speed. The plasma working gas 5 is preferably pure Ar.
Inventors:
Hideki Hamatani
Yasunobu Miyazaki
Masahiro Kohara
Osamu Tatsuta
Yasunobu Miyazaki
Masahiro Kohara
Osamu Tatsuta
Application Number:
JP2114698A
Publication Date:
September 25, 2001
Filing Date:
February 02, 1998
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B23K26/21; B23K26/14; B23K26/346; (IPC1-7): B23K26/00; B23K26/14
Domestic Patent References:
| JP58184085A | ||||
| JP61232079A | ||||
| JP1022273A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)